How severe is CVE-2026-28507?

CVE-2026-28507 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-28507 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-28507?

CVE-2026-28507 affects Withknown Known. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-28507?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-28507 have an EU (EUVD) identifier?

Yes. CVE-2026-28507 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9983.

When was CVE-2026-28507 published?

CVE-2026-28507 was published on 2026-03-06 and last updated on 2026-06-17.

CVE-2026-28507

CVE-2026-28507 is a high-severity vulnerability in Withknown Known with a CVSS 3.x base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v4: 8.6
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-9983
Weakness: CWE-78
Affected product: Withknown Known
Published: 2026-03-06
Last modified: 2026-06-17

Description

Idno is a social publishing platform. Prior to version 1.6.4, there is a remote code execution vulnerability via chained import file write and template path traversal. This issue has been patched in version 1.6.4.

Frequently asked questions

What is CVE-2026-28507?: Idno is a social publishing platform. Prior to version 1.6.4, there is a remote code execution vulnerability via chained import file write and template path traversal. This issue has been patched in version 1.6.4.
How severe is CVE-2026-28507?: CVE-2026-28507 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-28507 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-28507?: CVE-2026-28507 affects Withknown Known. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-28507?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-28507 have an EU (EUVD) identifier?: Yes. CVE-2026-28507 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9983.
When was CVE-2026-28507 published?: CVE-2026-28507 was published on 2026-03-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:withknown:known:*:*:*:*:*:*:*:*

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